Fix the exception 'can't read "state(sock)": no such element in array'
Fix the problem that tkhtml seems to ignore 'background-color' on tbody-tags.
If I have a html-table like ... <TD width=120px> ... all the columns are resized if the widget ist smaller then it should be.
The get_selection method doesn't account for when the "html text offset" command returns the empty string (it does, and the C source says it can).